Garry Monk was sacked as manager of Middlesbrough on Saturday night.
This comes after just four hours presiding over his side’s 2-1 win at Sheffield Wednesday.
Middlesbrough are seeking an immediate return to the Premier League and currently sit in ninth – three points off the play-off spots.
Gary Monk led his side to two victories in their last three outings – including the second-half fightback against the Owls.
Ross Wallace opened the scoring but the visitors hit back through Jonny Howson before Ryan Shotton fired in an 83rd-minute winner.
However, a damaging defeat to Millwall last weekend looks to have spelled the end for the former Leeds and Swansea chief.
A statement read: “The club would like to thank Garry for all his hard work and dedication, and wish him all the best for the future.
“The club’s academy manager Craig Liddle will take temporary charge of first team affairs during the interim period while a successor is appointed.”
Middlesbrough play at home to Bolton on Boxing Day and Aston Villa on December 30.